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If A = 2B for 3 by 3 matrices and |B| = 4, find |A|.
A32
B16
C8
D64
Answer & Solution
Correct answer: A. 32
Scaling a 3 by 3 matrix by 2 multiplies its determinant by 2 cubed = 8, so 8 x 4 = 32.
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